diff --git a/CHANGELOG.md b/CHANGELOG.md
index facab2d..f93bac3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -77,6 +77,7 @@ For major (breaking) changes - **version 4, 3 and 2** - see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 5.6.22         | 2021-05-18     | `diskLayout()` fixed to small buffer smartdata (linux) |
 | 5.6.21         | 2021-05-14     | `graphics()` fixed dual gpu issue (macOS) |
 | 5.6.20         | 2021-05-07     | `system()` fixed vm detection (linux) |
 | 5.6.19         | 2021-05-06     | `services()` modified service listing (linux) |
diff --git a/docs/history.html b/docs/history.html
index e7cec98..9f0562f 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -56,6 +56,11 @@
                   </tr>
                 </thead>
                 <tbody>
+                  <tr>
+                    <th scope="row">5.6.22</th>
+                    <td>2021-05-18</td>
+                    <td><span class="code">diskLayout()</span> fixed to small buffer smartdata (linux)</td>
+                  </tr>
                   <tr>
                     <th scope="row">5.6.21</th>
                     <td>2021-05-14</td>
diff --git a/docs/index.html b/docs/index.html
index c32439d..4603855 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -170,7 +170,7 @@
       <img class="logo" src="assets/logo.png">
       <div class="title">systeminformation</div>
       <div class="subtitle"><span id="typed"></span>&nbsp;</div>
-      <div class="version">New Version: <span id="version">5.6.21</span></div>
+      <div class="version">New Version: <span id="version">5.6.22</span></div>
       <button class="btn btn-light" onclick="location.href='https://github.com/sebhildebrandt/systeminformation'">View on Github <i class=" fab fa-github"></i></button>
     </div>
     <div class="down">
diff --git a/lib/filesystem.js b/lib/filesystem.js
index 0b2ea84..9f1a029 100755
--- a/lib/filesystem.js
+++ b/lib/filesystem.js
@@ -96,7 +96,7 @@ function fsSize(callback) {
         }
         if (_linux) { cmd = 'df -lkPTx squashfs | grep  -E "^/|^.\\:"'; }
         if (_freebsd || _openbsd || _netbsd) { cmd = 'df -lkPT'; }
-        exec(cmd, function (error, stdout) {
+        exec(cmd, { maxBuffer: 1024 * 1024 }, function (error, stdout) {
           if (!error) {
             let lines = stdout.toString().split('\n');
             data = parseDf(lines);
@@ -105,7 +105,7 @@ function fsSize(callback) {
             }
             resolve(data);
           } else {
-            exec('df -kPT', function (error, stdout) {
+            exec('df -kPT', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
               if (!error) {
                 let lines = stdout.toString().split('\n');
                 data = parseDf(lines);
@@ -172,7 +172,7 @@ function fsOpenFiles(callback) {
       };
       if (_freebsd || _openbsd || _netbsd || _darwin) {
         let cmd = 'sysctl -a | grep \'kern.*files\'';
-        exec(cmd, function (error, stdout) {
+        exec(cmd, { maxBuffer: 1024 * 1024 }, function (error, stdout) {
           if (!error) {
             let lines = stdout.toString().split('\n');
             result.max = parseInt(util.getValue(lines, 'kern.maxfiles', ':'), 10);
@@ -351,7 +351,7 @@ function blockDevices(callback) {
       if (_linux) {
         // see https://wiki.ubuntuusers.de/lsblk/
         // exec("lsblk -bo NAME,TYPE,SIZE,FSTYPE,MOUNTPOINT,UUID,ROTA,RO,TRAN,SERIAL,LABEL,MODEL,OWNER,GROUP,MODE,ALIGNMENT,MIN-IO,OPT-IO,PHY-SEC,LOG-SEC,SCHED,RQ-SIZE,RA,WSAME", function (error, stdout) {
-        exec('lsblk -bPo NAME,TYPE,SIZE,FSTYPE,MOUNTPOINT,UUID,ROTA,RO,RM,TRAN,SERIAL,LABEL,MODEL,OWNER 2>/dev/null', function (error, stdout) {
+        exec('lsblk -bPo NAME,TYPE,SIZE,FSTYPE,MOUNTPOINT,UUID,ROTA,RO,RM,TRAN,SERIAL,LABEL,MODEL,OWNER 2>/dev/null', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
           if (!error) {
             let lines = blkStdoutToObject(stdout).split('\n');
             data = parseBlk(lines);
@@ -360,7 +360,7 @@ function blockDevices(callback) {
             }
             resolve(data);
           } else {
-            exec('lsblk -bPo NAME,TYPE,SIZE,FSTYPE,MOUNTPOINT,UUID,ROTA,RO,RM,LABEL,MODEL,OWNER 2>/dev/null', function (error, stdout) {
+            exec('lsblk -bPo NAME,TYPE,SIZE,FSTYPE,MOUNTPOINT,UUID,ROTA,RO,RM,LABEL,MODEL,OWNER 2>/dev/null', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
               if (!error) {
                 let lines = blkStdoutToObject(stdout).split('\n');
                 data = parseBlk(lines);
@@ -374,7 +374,7 @@ function blockDevices(callback) {
         });
       }
       if (_darwin) {
-        exec('diskutil info -all', function (error, stdout) {
+        exec('diskutil info -all', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
           if (!error) {
             let lines = stdout.toString().split('\n');
             // parse lines into temp array of devices
@@ -509,7 +509,7 @@ function fsStats(callback) {
       if ((_fs_speed && !_fs_speed.ms) || (_fs_speed && _fs_speed.ms && Date.now() - _fs_speed.ms >= 500)) {
         if (_linux) {
           // exec("df -k | grep /dev/", function(error, stdout) {
-          exec('lsblk -r 2>/dev/null | grep /', function (error, stdout) {
+          exec('lsblk -r 2>/dev/null | grep /', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
             if (!error) {
               let lines = stdout.toString().split('\n');
               let fs_filter = [];
@@ -521,7 +521,7 @@ function fsStats(callback) {
               });
 
               let output = fs_filter.join('|');
-              exec('cat /proc/diskstats | egrep "' + output + '"', function (error, stdout) {
+              exec('cat /proc/diskstats | egrep "' + output + '"', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
                 if (!error) {
                   let lines = stdout.toString().split('\n');
                   lines.forEach(function (line) {
@@ -549,7 +549,7 @@ function fsStats(callback) {
           });
         }
         if (_darwin) {
-          exec('ioreg -c IOBlockStorageDriver -k Statistics -r -w0 | sed -n "/IOBlockStorageDriver/,/Statistics/p" | grep "Statistics" | tr -cd "01234567890,\n"', function (error, stdout) {
+          exec('ioreg -c IOBlockStorageDriver -k Statistics -r -w0 | sed -n "/IOBlockStorageDriver/,/Statistics/p" | grep "Statistics" | tr -cd "01234567890,\n"', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
             if (!error) {
               let lines = stdout.toString().split('\n');
               lines.forEach(function (line) {
@@ -658,7 +658,7 @@ function disksIO(callback) {
           // var cmd = "for mount in `lsblk | grep / | sed 's/[│└─├]//g' | awk '{$1=$1};1' | cut -d ' ' -f 1 | sort -u`; do cat /sys/block/$mount/stat | sed -r 's/ +/;/g' | sed -r 's/^;//'; done";
           let cmd = 'for mount in `lsblk 2>/dev/null | grep " disk " | sed "s/[│└─├]//g" | awk \'{$1=$1};1\' | cut -d " " -f 1 | sort -u`; do cat /sys/block/$mount/stat | sed -r "s/ +/;/g" | sed -r "s/^;//"; done';
 
-          exec(cmd, function (error, stdout) {
+          exec(cmd, { maxBuffer: 1024 * 1024 }, function (error, stdout) {
             if (!error) {
               let lines = stdout.split('\n');
               lines.forEach(function (line) {
@@ -685,7 +685,7 @@ function disksIO(callback) {
           });
         }
         if (_darwin) {
-          exec('ioreg -c IOBlockStorageDriver -k Statistics -r -w0 | sed -n "/IOBlockStorageDriver/,/Statistics/p" | grep "Statistics" | tr -cd "01234567890,\n"', function (error, stdout) {
+          exec('ioreg -c IOBlockStorageDriver -k Statistics -r -w0 | sed -n "/IOBlockStorageDriver/,/Statistics/p" | grep "Statistics" | tr -cd "01234567890,\n"', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
             if (!error) {
               let lines = stdout.toString().split('\n');
               lines.forEach(function (line) {
@@ -791,7 +791,7 @@ function diskLayout(callback) {
       if (_linux) {
         let cmdFullSmart = '';
 
-        exec('export LC_ALL=C; lsblk -ablJO 2>/dev/null; unset LC_ALL', function (error, stdout) {
+        exec('export LC_ALL=C; lsblk -ablJO 2>/dev/null; unset LC_ALL', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
           if (!error) {
             try {
               const out = stdout.toString().trim();
@@ -851,7 +851,7 @@ function diskLayout(callback) {
           }
           // check S.M.A.R.T. status
           if (cmdFullSmart) {
-            exec(cmdFullSmart, function (error, stdout) {
+            exec(cmdFullSmart, { maxBuffer: 1024 * 1024 }, function (error, stdout) {
               try {
                 const data = JSON.parse(`[${stdout}]`);
                 data.forEach(disk => {
@@ -871,7 +871,7 @@ function diskLayout(callback) {
               } catch (e) {
                 if (cmd) {
                   cmd = cmd + 'printf "\n"';
-                  exec(cmd, function (error, stdout) {
+                  exec(cmd, { maxBuffer: 1024 * 1024 }, function (error, stdout) {
                     let lines = stdout.toString().split('\n');
                     lines.forEach(line => {
                       if (line) {
@@ -913,7 +913,7 @@ function diskLayout(callback) {
         resolve(result);
       }
       if (_darwin) {
-        exec('system_profiler SPSerialATADataType SPNVMeDataType SPUSBDataType', function (error, stdout) {
+        exec('system_profiler SPSerialATADataType SPNVMeDataType SPUSBDataType', { maxBuffer: 1024 * 1024 }, function (error, stdout) {
           if (!error) {
             // split by type:
             let lines = stdout.toString().split('\n');
@@ -1071,7 +1071,7 @@ function diskLayout(callback) {
             }
             if (cmd) {
               cmd = cmd + 'printf "\n"';
-              exec(cmd, function (error, stdout) {
+              exec(cmd, { maxBuffer: 1024 * 1024 }, function (error, stdout) {
                 let lines = stdout.toString().split('\n');
                 lines.forEach(line => {
                   if (line) {